Double-passage ground-state cooling induced by quantum interference in the hybrid optomechanical system

Abstract

We propose a quantum interference cooling scheme for a nano-mechanical resonator (NAMR) in a hybrid optomechanical system. In our scheme, atoms are trapped in an optomechanical cavity, and this optomechanical cavity interacts both atoms and an optical cavity. Therefore, the absorption of the optomechanical resonator can be modified by quantum interference effects induced by the atom-cavity and cavity-cavity couplings. With the modification of the quantum interference, the desired transition for cooling is enhanced, while the undesired transition for heating can be suppressed. As a result, the NAMR vibration can be cooled down to its ground state. Particularly, with the assistance of the atoms, the experimental difficulty can be reduced since the effective decay rate of the cavity can be decreased via the quantum interference for the atom-cavity coupling.

Molecular Polaritons for Chemistry, Photonics and Quantum Technologies

“…Moreover, the coupling of optical and optomechanical cavities , (Figure d) further extends the potential of optomechanics. This innovative theoretical scheme allows three strong-coupling effects: (i) between a molecule/atom and cavity 2, (ii) between mechanical oscillator and cavity 2, and (iii) between cavities 1 and 2.…”

“…J is the coupling strength between the two cavities, a 1 and a 2 correspond to the creation of cavities 1 and 2, and ε l is the external field applied to cavity 2, e.g., a pump laser. Reproduced with permission from ref . Copyright 2018 Nature Publishing Group.…”

Force Dependent Quantum Phase Transition in the Hybrid Optomechanical System

“…. The Hamiltonian (22) shows, in the super-radiant phase, although the moving mirror effectively decouples from the Dicke Hamiltonian part (23), it still suffers an effective classical driving force for the macroscopically excited field and atoms. Moreover, as the critical value χ c of QPT depends on the effective frequency ωa , which is linear to the external force for Equation (5), it is possible to control this super-radiant phase with the external force.…”

“…Optomechanical cavity works as an ideal platform to study the quantum properties of macroscopic mechanical systems. It has attracted great attentions to explore many interesting quantum properties, such as squeezing and entanglement [1][2][3][4][5], optomechanically induced transparency [6][7][8][9][10] and chaos [11,12], which are associated with potential applications in quantum information processing [13,14], ground state cooling of the mechanical modes [15][16][17][18][19][20][21][22] and precision measurement [10,23,24].…”

Ground state cooling of an optomechanical resonator with double quantum interference processes*

“…These works for quantum inference cooling can be achieved with the assistance of coupled cavities, [14][15][16] superconductor systems, [17] quantum dots, [18][19][20] nitrogenvacancy (NV) centers, [21][22][23][24] and cavity quantum electrodynamics systems. [25][26][27][28][29][30][31][32][33][34][35][36] In these schemes, the internal degrees of freedom (d.o.f) works as a hybrid-multilevel configuration, and ground-state cooling can be achieved by the quantum interference effects, such as electromagnetically induced transparency (EIT) [37][38][39] and EIT-like effects. [40][41][42] Under the action of the quantum interference, the first red-sideband transition can be enhanced, while the one for blue-sideband will be suppressed, and the ground state cooling of the MR can be achieved in this way.…”